JPS6046818A - Device for inspecting size and shape of bend pipe, and executing marking-off and groove working to pipe end part of bend pipe concerned - Google Patents

Abstract

PURPOSE:To obtain a titled device which is capable of executing quickly an inspection, working, etc. of plural solid bend pipes by providing so as to be movable and fixable one of two rotating bases having a pipe end supporting part which can be rotated and fixed centering around a vertical shaft, on a reference horizontal surface. CONSTITUTION:Two rotating bases 3, 5 which can be rotated and fixed centering around a shaft of a vertical direction are provided on a reference horizontal surface 1a of a base 1. One rotating base 3 is placed so that it can be rotated and fixed relatively against the other rotating base 5, and also a racking supporting part 4 of a pipe end part P1 of a bend pipe P which has a prescribed effective height and also is constituted so that its center passes through said rotating shaft Z1 in the direction substantially parallel to the reference horizontal surface 1a is formed on its upper face. Also, an oscillating base 7 supported so as to be oscillatable and fixable by an oscillating shaft 6a which is parallel to the reference horizontal surface 1a, passes through its rotating shaft Z2 and also has the same height as an effective height of said racking supporting part 4 is provided on the other rotating base 5. Also, as for this oscillating base 7, a grip supporting part of the other pipe end part P2 is provided in a pipe through-hole 7a so that its center axis passes through a intersection point of said oscillating shaft 6a and the rotating shaft Z2.

Description

[Detailed Description of the Invention] The present invention mainly inspects the size and shape of a three-dimensional multi-curved pipe, marks the positions of the cut surfaces at both ends, and, if necessary, directly performs cutting or beveling there. The invention relates to a device that can perform the following functions. One of the inventors of the present invention has developed a device of this type that inspects the dimensional accuracy of a tube that has undergone single or multiple bending processes (hereinafter referred to as a three-dimensional multi-bent tube), performs accurate centering, and He invented a device that could perform beveling on steel and filed a patent application (Japanese Patent Application No. 56-46228).

In the technical field to which the present invention relates, inventions relating to a workbench for reproducing the relative positional relationship between flanges during pipe production are disclosed in Japanese Patent Publication No. 50-27893 and Japanese Patent Publication No. 50-27893.
], -428tJ, and Japanese Unexamined Patent Publication No. 50-61724, but all of these inventions have different purposes from the present invention, and naturally have different structures.

Therefore, the apparatus according to the application No. 1 calculates, for example, the distance between the pipe end faces of a three-dimensional multi-curved pipe and the angle with respect to the reference plane set in the apparatus (ii) from the drawing for a given three-dimensional multi-curved pipe. It inspects whether it matches the calculated value, performs centering, and cuts to the dimensions according to the drawing, or can be beveled. A 8-distance and orientation indexing device configured to be able to freely orient and fix a scribing reference plane formed to indicate the straight line distance connecting the tube and the orientation of the both end faces, is provided with a scribing reference plane of the tube and the direction of the scribing reference plane of the tube. The surface angle formed by the center line of both ends of the pipe (straight pipe part) can be detected, and the mounting position and orientation of the straight pipe part at both ends with respect to the indexing device can be finely adjusted. The main feature is that the tube end support means is attached to fix the mounting position and orientation of the tube end.

However, although the above-mentioned device has solved the intended problem in that it can fully achieve its intended purpose, it is not possible to use a 8-axis distance and orientation indexing device that has a two-axis flow type scribing reference surface. It has been found that because the end support means are provided at both ends of the device, there is a problem in that the three-dimensional multi-bent tube cannot be easily and quickly attached to and removed from the device.

Therefore, as a result of various studies, the inventor of the present invention found that a three-dimensional multi-curved pipe always has straight pipe parts at both ends, and when such a pipe is placed on a horizontal surface such as the floor, one pipe end It was discovered that when the bent pipe is placed in a horizontal position, the other end of the pipe is always in a downward or approximately horizontal position. The present invention was completed based on the knowledge that mounting is the easiest and quickest way to attach and detach the bent pipe to the device.

-4~ That is, an object of the present invention is to provide an apparatus that allows easy attachment and detachment of a three-dimensional multi-curved pipe to be inspected, etc., and that enables rapid inspection of dimensions and shape, bevel processing, etc. Its main structure is that two units are mounted on a base having a reference horizontal plane that is essentially two planes, and are capable of rotating and fixing around an axis perpendicular to the reference horizontal plane. At least one of the swivel bases can be moved and fixed relative to the other swivel base on the reference horizontal plane, and the upper surface of one of the swivel bases has a predetermined effective height and is substantially on the reference horizontal plane. A mounting support for one end of the tube is formed with the top parallel to the top and the center thereof passes through the pivot axis, and a support section is provided on the top surface of the other swivel base substantially parallel to the reference horizontal plane and on the pivot axis. A rocking table is provided which is swingable and fixedly supported by a shaft that passes through the pipe and is substantially at the same height as the effective height of the rack support part, and that the other pipe end is attached to the rocking table. The grip support part of the part is provided so that its central axis passes through the intersection of the swing axis and the rotation axis.

Next, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is a base having one reference horizontal surface 1a, and 2 is a sliding base that can slide in the longitudinal direction of the base 1, which is guided by a guide portion 1b formed on the base 1. Since the slide table 2 is designed to slide in response to the rotation of the feed screw IC, the slide table 2 can be positioned and fixed by restraining the rotation of the screw IC. Reference numeral 3 denotes a first swivel base supported on the upper surface of the slide base 2 so as to be rotatable about an axis (not shown in the figure, but this axis becomes the first swivel axis z1) that is perpendicular to the reference horizontal plane 1a. The turning angle of the portion 3 can be fixed by any fixing means (not shown). In addition, in Figure 1,
P is the three-dimensional multi-curved pipe to be inspected, Pl is one end thereof,
P2 is the other end.

Reference numeral 4 denotes a mounting support section for one tube end P1 that is installed upright on the top surface of the swivel table 3, and includes three receiving plates in which a notch 4a having a shape that conforms to the cross-sectional shape of the tube to be supported is formed on the top. 41 to 43 are arranged in parallel.

Since the support section 4 always supports the one tube end P1 in a direction parallel to the reference horizontal plane 1a, that is, in a horizontal or substantially horizontal direction, two or more receiving plates are required.

Here, 41 to 43 are provided on the swivel base 2 so as to be spaced apart from each other, and the cutout portions 4a of each plate formed on the top have a predetermined height h arbitrarily determined.

Therefore, the support portion 4 may be formed by using a support member in which a plurality of rollers are arranged in a row in the shape of the cutout portion 4a instead of using a plate as the support. Also, when one pipe end P1 is made horizontal, the pipe end P1 is
In order to understand the direction (angle) of 1, here we use the receiving plate 4I.
is located mainly on the axis z1 of the first swivel base 3, and the receiver is located on the plate 4.
3 is designed so that it can be attached and detached depending on the length of the straight fall portion of one end of the tube. The distance between the plate 41-'-tr3 of the receiver is at least the same as the outer diameter of the pipe, and the outer end surface of the plate 41 of the receiver includes the first pivot axis z1 or is spaced an appropriate distance from the axis z1. and position it to form a scribing reference surface. Hereinafter, the above-mentioned scribing reference surface will be referred to as a first scribing reference surface.

In short, the support part 4 supports the tube end P1 with its axis being the first
It is positioned through the rotation axis z1 and supported so that its axis is substantially parallel to the reference horizontal plane 1a, and it is checked whether it is positioned in such an attitude. It is a means to do so. Therefore, it goes without saying that an angle (not shown) for reading the rotation angle of the first swivel base 3 is attached to either the swivel base 3 or the sliding base 2.

5 forms an axis (not shown in the figure, a second pivot axis Z2) parallel to the first pivot axis z1 mentioned above on the upper surface of the other end side (right side in FIG. 1) of the base 1. ), the second swivel base 6 is two support legs erected on the outer periphery of the upper surface of the swivel base 5, and the upper part 6 has a reference horizontal plane 1.
A swing shaft 6a is provided at a height h from a, parallel to the reference horizontal plane 1a, and passing through the pivot axis z2, and a swing table 7 is attached to the shaft 6a so as to be swingable and fixed. Furthermore, 5a, 6
b is an angle display for reading the turning angle and the swinging angle, respectively.

Further, the rocking table 7 has an insertion hole 7a in its center through which the other pipe end P2 of the maximum diameter of the pipe P handled by the device of the present invention can be inserted with a margin. Hole 7
A support device 8 is provided around a as a grip support section for the tube end P2, which will be described later.

Therefore, due to the configuration of the rocking table 7, the above-mentioned 1i.
A line segment s1 connecting the point of height h of the rotation axis 71' and the point of height h of the second rotation axis z2 is parallel to the reference horizontal plane 1a, and
Since this is a line segment connecting both flow rotational axes Zl and 22, the length of this line segment s1 and the reference horizontal plane 1a including this line segment s1.
A plane parallel to the plane serves as a reference plane for determining the calculated distance or angle in the device of the present invention.

In addition, the front or back surface of the swing table 7 includes the intersection of the second pivot axis Z2 and the swing axis 6a, or is spaced apart in parallel by an appropriate distance, so that the markings on the other pipe end P2 side can be Form a reference surface. Note that this reference plane will hereinafter be referred to as a second reference plane. That is, in FIG. 1, since one straight pipe end P1 of the three-dimensional multi-curved pipe P mounted on the apparatus of the present invention is in a substantially horizontal position, the angle α between the core part P1 and the reference line sf is The tube end surface of the core P1 is the base '1! Angle with i-line s1,
In other words, it represents the turning angle of the turning table 3, and is the angle β between the plane-projected center line of the other straight pipe end P2 and the reference line s1.
represents the turning angle of the turning table 5, and furthermore, the reference horizontal plane 1a
Since the rising angle γ of the pipe end P2 relative to the angle represents the swinging rotation angle of the rocking table 7, when inspecting the bent pipe P, etc., adjust the angle of each table 3°05.7 in advance. I'll keep it.

Therefore, in any three-dimensional multi-curved pipe, one end of the pipe should be oriented horizontally as shown in Figure 1, and the other end should be placed downward or horizontally, so that the angles α, β, γ, and Since the length of the line segment sl can be determined using three-dimensional analysis geometry or vector analysis, the length of the line segment sl can be realized by moving the slide table 2, and the length of the first swivel table 3 can be determined by moving the slide table 2. If the angle is set to α with respect to the reference line sl, the angle of the second swivel table 5 is set to β, and the angle of the rocking table 7 is set to γ, a pipe that has been three-dimensionally beveled with a predetermined accuracy can be set at one end of the pipe. This means that the device can be mounted in a horizontal position on the device of the present invention. A tube that cannot be directly mounted on the apparatus of the present invention is mounted while moving the setting part, and the numerical value representing the angle or dimension moved indicates the bending error.

Next, the reason why the support device 8 is necessary in the apparatus of the present invention will be explained.

As mentioned above, the length of line segment s1, each angle α, β is calculated by calculating
, γ, and with the swivel tables 3 and 5 and the rocking table 7 adjusted to these values, when mounting the curved pipe P on the device of the present invention,
It is convenient for use that the length of S]- is fixed, α is rotatable, and β and γ are fixed.

However, at this time, it cannot be made clear in advance how much the other tube end P2 should be passed through the insertion hole 7a of the rocking table 7. However, if the curved pipe P is bent accurately according to the design drawing, it is known in advance how far from the rounded position the markings should be placed on both ends of the curved pipe P. , this scribing position can be roughly estimated by visually marking the position of the radius, and therefore, using this guide, both pipe ends P1. ．． P
2, and place the curved pipe on the apparatus of the present invention, aligning the mark on one tube end Pl side with the first scribing reference plane formed by the support part 4 of the apparatus of the present invention, and then After temporarily fixing the tube end P2 side 11- with the supporting device 8, the optimum fixing position, that is, the length of the line segment s1 and the angles α, β, and γ, can be determined by finely adjusting the fixing position. All you have to do is find a satisfactory fixing position within the allowable range.

Therefore, in the present invention, a support is provided around the insertion hole 7a of the rocking table 7 in order to adjust the fixed position with respect to the scribed surface on the other tube end P2 side and to take measures to cope with minute errors in the angles β and γ. Apparatus 8 was constructed as described below.

In FIG. 2, reference numeral 81 indicates a leg 8 erected on the top surface of the rocking table 7.
This is a claw ring supported by 1a, and an insertion hole 81b is formed in the center thereof to form a minute gap d with respect to the tube end P2. 82
is a mounting plate suspended from the lower surface of the rocking table 7 via a support rod 82a, and has a guide ball portion 83a in the center of its upper surface with an outer diameter that allows the upper end to be loosely inserted into the pipe end P2. While the core member 83 is erected, a plate-shaped magnetic chuck 84 supported by a handle nut member 84a screwed onto a screw 82b formed on one of the support rods 82a is provided, so that the support device 8 can be Configure an example. Incidentally, the magnetic chuck 84 forms a surface substantially parallel to the swinging unit 12 and the swing unit 7.

The support device 8 shown in FIG. 2 supports the tube end P2 by having the inner surface of the tube end P2 supported and guided by the guide ball 83a, and the other end surface being supported by the chuck 84. However, the gap d formed between the inner surface of the claw ring 81 and the outer surface of the tube end P2 is such that the bending error of the tube is 1 to 3 degrees toward the tube end P2 side.
This is to absorb the angular error that appears around 0 minutes, and the vertical movement of the chuck 84 is to adjust the position of the tube end P2 with respect to the scribed surface and move the tube as described above. This is for supporting the end surface of the end portion P2.

The support device 8 shown in FIG. 3 is provided with a mounting plate 821 supported by a spherical bearing 82c so as to be able to swing by a small angle δ instead of the mounting plate 82 of FIG. 2 suspended from a support rod 82a. A scroll chuck 841 is provided on the upper surface of the plate 82 via an elevating means such as a hydraulic cylinder 82d, and a support claw 811 is formed on the chuck 841 to support the end surface and outer periphery of the pipe end P2 by contacting them. It was constructed by

Note that 821a is a guide wall erected on the outer periphery of the mounting plate 821;
841a is a bottom hole of the chuck 841 supported and guided by the inner surface of the guide wall 821a.

Therefore, in the support device 8 shown in the third figure, the mounting plate 8
21 is supported by a spherical bearing 82c so as to be able to swing at a minute angle δ, which plays the role of forming the gap d in the device shown in FIG. This makes it possible to finely adjust the position of the portion P2 with respect to the scribed surface formed with the rocking table 7 as a reference.

2. The other tube end P2 supported by the support device 8 shown in FIG. 2 or FIG. If the length of the standard line segment s1 matches (including the allowable error range), it means that the entire curved pipe P has been processed within the predetermined bending accuracy, but these angles and the rotation axis If the tube end P2 cannot be supported unless the position of Z2 falls outside the allowable error range, the tube P will be modified depending on the extent of the problem, or a warning will be given that it should be treated as a defective product. judge.

In addition, in the support device 8 shown in FIGS. 2 and 3, the main members forming this device 8 are on the back side of the rocking table 7, so the rocking table 7
It is assumed that a scribing reference surface is formed on the front side of the .

The support device shown in FIG. 4 has its components assembled on the surface side of the rocking table 7, and includes a mounting plate 821 in which a tube insertion hole 821b is formed in a spherical bearing 82c provided at the upper part of a support rod 82a. At the same time, a scroll chuck 841 is provided on the lower surface of the plate, and a downward supporting claw 8]2 is provided on the lower surface of the chuck so as to face into the insertion hole 7a of the rocking table 7. A support ring 822 having lifting means such as an upward hydraulic cylinder 82d is provided rotatably and fixedly with respect to the rocking table 7.
A clamp 813 for gripping the tube end P2 is provided at the tip of the rod 2d.

Thus, the support claw 812 has a mounting plate 821 that is attached to the spherical bearing 82.
While the clamp 813 swings by a small angle δ due to
is moved downward by the hydraulic cylinder 82d, so that the downward position 15- of the tube end relative to the rocking table 7 can be adjusted.

In the apparatus 8 shown in FIG. 4, the constituent members of the support device 8 are not disposed on the back side of the rocking table 7 because a reference surface for marking is set on the back side of the rocking table 7, and necessary markings are made on the back side of the rocking table 7. Write or write;
Alternatively, instead of marking, it is possible to set tools, devices, etc. for cutting the excess portion of the pipe end P2 and finishing the bevel, and to make it easier to handle them. be.

The support device 8 shown in FIG.
Support rollers 831a supported by legs 831 are provided radially on the claws of the chuck 841 so that each roller abuts and supports the tube end P2 from its inner or outer surface, while the upper surface of the chuck 841 A plate-shaped magnetic chuck 84 is provided via a spherical bearing 84b at the upper end of an elevating means such as a hydraulic cylinder 82d with an output end protruding from a rod or the like. In the figure, reference numeral 81 denotes a support claw erected around the insertion hole 7a on the upper surface of the rocking table 7, and is provided vertically 16- so as to secure a minute gap d between it and the outer periphery of the tube end P2. I/Chuck 84 spherical bearing 8/I
This is to be able to cope with minute angle fluctuations in b.

The magnetic chuck 84 shown in FIG. 5 has a notch 8 through which the leg 831 of the support roller 831a is inserted.
4c are formed radially, and FIG. 6 shows the rollers 83
It shows the planar shape of the magnetic chuck 84 when three pieces 1a are provided radially.

In the apparatus shown in FIG. 5, the supporting roller 831a is supported by the claws of the scroll chuck 841 via its legs 831, so that the roller 831a is adjusted in accordance with the inner and outer diameters of the tube to be supported. can change the position of the second
This is more convenient than using the core bar 83 shown in the figure. still,
The two-dot chain line in the figure indicates a small-diameter tube, and in the case of a small-diameter tube, the outer periphery of the tube is supported.

In this case, it goes without saying that the support A1 should have a tip bent inward (not shown), and the support device 8 shown in FIG. After temporarily placing it on the tube end P2 and fixing it on the tube end P2, it is placed on the rocking table 7 together with the core P2.
When removed from the pipe, the lower surface of this device 8 attached to the pipe end P2 forms a reference surface for scribing, cutting, beveling, etc.

First, the end surface of the pipe end P2 is attached to the output end of a lifting means such as a hydraulic cylinder 82d provided on the mounting plate 82 supported by the support rod 82a on the lower surface of the rocking table 7. The magnetic chuck 841 is also supported.

On the other hand, the peripheral wall of the tube end P2 is supported by support means described below.

That is, an annular base 85 having an inner circumferential surface formed as a spherical bearing 85a and a flange 85b on the outer circumferential edge, an outer circumferential surface formed as a spherical journal portion 86a that fits the bearing 85a, and an upper force applied to the inner circumferential surface. 1. A support flange plate 8 having a support cylinder portion which is widened and formed into a tapered cylinder wall portion 86b.
6 is mounted by fitting its journal portion 86a into the bearing 85a so as to be able to swing by a minute angle δ, while a bolt rod 86c is provided upright on the flange plate 86'' on the tapered cylindrical wall portion 86b. Cholera 1 is inserted with a chuck-shaped wedge member 87 that is moved up and down on the
6. ．． 87 is the flange 85b of the base 85 and the spherical bearing 8
5a, a fixing bolt 85C that comes into contact with the journal portion 86a and fixes its swing;
6" is screwed onto the upper surface of the flange of the base plate 85 to regulate the swing angle δ.

The wedge member 87 can be relatively movable and fixed by a regulating bolt 86d that fixes it and an adjustment nut 87a that is screwed onto the bolt rod 86c and regulates and fixes the vertical position of the wedge member 87.

Here, in order to set the center of the central hole in the base 85 to be concentric with the insertion hole 7a of the rocking table 7, on the top surface of the rocking table 7,
An annular member having a radius matching the outer diameter of the base plate 85 and having a circular arc shape of about 1/3 is fixed as a positioning member 88 concentrically with the insertion hole 7a.

In the supporting device 8 shown in FIG.
．． 5c, 86c and the nut 87a are loosened, the tube end P2 is inserted, the tube end face is supported by the magnetic chuck 8419-, and the base 85 is fixed to the support flange plate by tightening the bolts 85c, 86c and the nut 87a. 86. It is integrated with the wedge member 87 and fixed to the outer periphery of the tube end P2, and the back surface of the base 85 forms a reference surface for beveling etc., and its center coincides with the center of the tube end surface. .

Therefore, as shown in FIG. 8, if the base 85 integrated with the support flange plate 86 and the wedge member 87 is fixed to the clamp 9b of the support arm 9a of the groove cutting machine 9, the workpiece can be rested and centered. Therefore, by rotating the cutter 9C, a beveling process can be performed on a predetermined end surface of the tube end P2.

In this way, the apparatus shown in FIGS. 7 and 8 has a tube end P
Since the wedge member 87.2 is integrated with the wedge member 87.2, positioning and centering can be performed at the same time in the beveling process. The device part consisting of the base plate 86 with the supporting flange plate 86 can also be mounted on the side of one tube end P1. That is, if the back surface of the base plate 85 is aligned with the 20- rear surface of the receiving plate 41 in the support part 4 that supports one tube end P1 in a substantially horizontal position,
One pipe end Pi side also has a reference surface for beveling, and a centered jig is installed, so it is possible to save the trouble of setting up the beveling to be performed later. There is an advantage.

An example of the use of the device of the present invention constructed as described above will be described using the support device 8 shown in FIGS. 1, 7, and 8.

First, in an arbitrary three-dimensional multi-curved pipe P, one pipe end P1
and the other P2 are arbitrarily selected, and the curved pipe P is placed on the floor so that one pipe end Pl side is parallel to the floor surface and the other pipe end P2 side is parallel to the floor surface or always facing downward. put.

Next, the slide table 2 is positioned so that the distance between the first rotation axis z1 and the second rotation axis Z2 of the device of the present invention matches the length of the reference line segment S1 calculated in advance for the curved pipe P, and the rotation table 3, 5 are set to α and β, respectively, and the inclination angle of the rocking table 7 is set to γ. In addition, when the curved pipe P is in the form shown in the first figure, the angles β and γ between the swivel base 5'' and the oscillating base 7 are temporarily fixed, and the swivel base 3 is aligned with the direction of the angle α. However, it is convenient for work to leave it without temporarily fixing it.

That is, in the above, the other pipe end P2 side of the bent pipe P placed on the floor is lifted up, the base 85 including the wedge member 87° and the support flange plate 86 is inserted into the core part, and the base 85 is placed in the substantially correct position as described above. Tighten the adjusting nut of the wedge member 87 at the expected position to temporarily fix the base 85, and then lift the entire bent pipe P while maintaining the posture when it was placed on the floor, and lift one end of the pipe. While lowering the section P1 onto the rack support device 4, the tip of the other tube end P2 is inserted into the insertion hole 7 of the rocking table 7.
an operation to align the base 85 in the core portion P2 with the positioning member 88 on the rocking table 7.

``The bending process of the curved pipe P is performed with a predetermined accuracy, and
If the temporary fixing position of the base plate 85 is accurate, the distance between the axes (
The length of the line segment s1) and the angles α, β, and γ are all set as set, and each member is positioned at 90%, which indicates that the machining accuracy of this curved pipe P meets the acceptance criteria, but normally Since the temporary fixing position of the base plate 85 is inaccurate, the following operation is performed.

That is, in the support device 8 shown in FIG. 7, the hydraulic cylinder 82d is operated to move the magnetic chuck 84 to the tube end P.
2, loosen the temporarily tightened wedge members 87 from 1 to 2, and operate the cylinder again.
The pipe end P2 is moved upward or immobile in the axial direction so that the angle of the first swivel base 3 approaches the set angle α.

If the bent pipe P is bent with a predetermined accuracy, the position and indexing angle of each member will be adjusted to the initial set value (
(including tolerance), the cylinder 82d is stopped when the cylinder 82d is matched, and the bolts 85c, 86d and nuts 87a of the base 85 are tightened to position and fix the base 85 to the tube end P2. After this, the support device 8 may be attached to the tube end Pl side.

In addition, if the position and indexing angle of each component of the device of the present invention do not fall within the predetermined range due to the above operations, the distance between the rotation axes Zl and 22 may be changed within the allowable range. Then, the indexing angles of each of the swivel tables 3 and 5 and the rocking table 7 are tried to be changed within the allowable range, and it is inspected whether the bent pipe P as a whole is bent with a predetermined accuracy.

Therefore, even in the apparatus of the present invention using the support device 8 for the other tube end P2 shown in FIGS. 2 and 6, the operating procedure may be carried out in accordance with the above example.

In order to correct a three-dimensional multi-curved pipe whose processing accuracy has been rejected according to the present invention, the correction location and correction amount may be determined based on the angular error of each of the swivel tables 3 and 5 and the rocking table 7.

Note that this determination can also be made automatically using a computer or the like.

The present invention is as described above, and since it is possible to rationally inspect the bending accuracy of a three-dimensional multi-curved pipe with good workability, it is easy to perform scribing and beveling after inspection. Moreover, there are effects that can be achieved quickly.

In particular, in the device of the present invention, one end of the three-dimensional multi-bent pipe is supported in a substantially horizontal position, and the other end is easily inserted or grasped, and the supporting device is mounted on the pipe. As a result of being able to easily and quickly attach and detach the tube to the device, good workability can be ensured. appears at the reference points at both ends, it is possible to allocate dimensional or angular errors to both ends, and therefore machining errors do not accumulate at one end, making it possible to perform inspections with a small correction rate.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an example of a three-dimensional multi-bent pipe being inspected by an example of the device of the present invention, and FIGS. 2 to 5 show the other tube end provided on the rocking table 7 in the device of the present invention. Part P2
FIG. 6 is a plan view showing another example of the magnetic chuck 84 in FIG. 5;
FIG. 7 is a longitudinal cross-sectional view showing another example of the support device 8, and FIG. 8 shows a portion of the support device 8 shown in FIG. It is a side view which shows an example of the state in which it is applied. 1... Base, 1a... Reference surface, 2... Slide table, 3
...Swivel base, 4...Rack support part for tube end P1, 4a
... Notch, 5... Turning base, zl... First turning axis, z2... Second turning axis, 6... Support leg, 6a... Rocking axis, 7... Rocking Moving table, 7a...Tube insertion hole, 8...
Supporting device 27 for pipe end P2 - Fig. 2 Fig. 3

Claims (1)

[Claims] 1. A base having a reference horizontal plane substantially forming three horizontal planes,
At least one of the two swivel tables provided so as to be rotatable and fixable about an axis perpendicular to the reference horizontal plane can be moved and fixed relative to the other swivel table on the reference horizontal plane; , on the upper surface of one of the swivel tables, a mounting support part of one tube end having a predetermined effective height and in a direction substantially parallel to the reference horizontal plane with its center passing through the swivel axis; and is swung and fixed on the top surface of the other swivel table with a swiveling axis that is substantially parallel to the reference horizontal plane, passes on its swivel axis, and is located at substantially the same height as the effective height of the rack support. A rocking table is provided, and the rocking table is provided with a grip support part for the other tube end such that its central axis passes through the intersection of the rocking axis and the rotation axis. A bent pipe 2 characterized by 2. The device according to claim 1, wherein the device is replaceable depending on the diameter of the tube to be supported, or the position of contact with the tube can be changed. 3. The gripping support part that supports the other pipe end is attached to the outer surface or the inner and outer surfaces of the pipe end in order to enable the supported pipe end to swing or swing at a minute angle and to be fixed with respect to the perpendicular line set on the rocking table. Appropriate support members for both sides. 2. The device according to claim 1, wherein the device is provided to be swingable, fixable, or swingably fixed to a chuck member or a spherical bearing member attached to the swing table. 4. In order to enable the grip support to move up and down and fix the pipe end to be supported with respect to a perpendicular line set on the rocking table, the grip support part is a support member that touches the end of the pipe end or grips the vicinity of the end of the pipe as described in 1. 4. The apparatus according to claim 1, wherein the support member is supported by a lifting means such as a hydraulic cylinder or a feed screw attached to a rocking table. 5. The device according to claim 3 or 4, wherein the grip support portion is provided on the upper surface side of the rocking table. 6. The device according to any one of claims 1 to 4, wherein the gripping support portion is located on the upper surface side of the rocking table and is detachably attached to the rocking table.